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Scientific American, Vol. 30, No. 18 (1874) (1874)
leaf 7
r, giving 1,500 tuns pressure, and the second, 2 6 ee with an 18 inch piston, giving 600 tuns pressure. The SAFETY BELL SIGNAL FOR RAILWAYS. pressure in the pumps is600 atmospheres. The piston de- At night and especially in times of dense fog, it may hap- scends upon the work, and for forging… … case torpedoes are used, they may fail to explode,{and thus Patented July 18, 1871. For further particulars see adver- of the engineer a maiter of certainty, Chronique de U Industrie, suggests the simple arrangement represented in the annexed engraving, ‘Two posts arg erect- © 1874 SCIENTIFIC…Internet Archive · Public domain (published before 1931). Free to use for anything.
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